To find out _______ young people think about the future of urban life, a teacher in the US. asked his students to think ______ they would run a city of 50,000 people in 2025.
In ________ old society many young women died by so strange and cruel ________ custom.
______the Internet is of great help, I don’t think it’s a food idea to spend too much time on it.
The growing speed of a plant is influenced by a number of factors, are beyond our control.
The president was so absorbed in his work that not a sound ______.
____of danger in the street at night, she had to go home, with a friend ___ her.